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people,mind,head,psychology,memorize
book,brain,education,cogwheel,user,people,mind,head,open book,gears,thinking,intelligence,psychology,memorize
book,brain,education,cogwheel,user,people,mind,head,open book,gears,thinking,intelligence,psychology,memorize
book,brain,education,cogwheel,user,people,mind,head,open book,gears,thinking,intelligence,psychology,memorize